Ticketing agent Eventbrite released new numbers today showing gross ticket sales of more than $600 million for 2012, up $240 million in just one year and putting the total dollar amount on tickets sold through the six-year-old site at more than $1 billion.

This great news must have given husband and wife co-founders Kevin and Julia Hartz much to celebrate over the holiday season – but has also renewed rumors that the company is in preparation for an IPO that began circulating more than two years ago.